Well, yes, visine can cause the blurry vision in some cases. As we know that visine are wildly used by many people, because it can relieve the itchy eyes, and the red eyes. in other words, it may be a godsend for itchy, red eyes, but you should remember that it works only on the surface. So how it works. Generally speaking, it works by constricting the surface blood vessels in the eye, and then it can reduce the red appearance. On the other hand, it can also have some side effects. For example, by drinking or taking Visine internally can lead to blurred vision. This happens to many people. Besides, it also can result in low body temperature, and an elevated, sharply dropped blood pressure. So just be careful about the intake of visine.